This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.
Hi Tapash, > Sir I am student of MCA, doing my project in NAL, India. > > My project is to convert HDF to NetCDF but I have no idea on NetCDF. > Can you please help me. Rather than trying to read all the documentation, I recommend looking at last years' netCDF Workshop: http://www.unidata.ucar.edu/software/netcdf/workshops/2009/ and looking through the list of Frequently Asked Questions: http://www.unidata.ucar.edu/software/netcdf/docs/faq.html Note that the latest version of the C-based netCDF-4 (4.1.1) can read some HDF4 and HDF5 data through the netCDF interface. Also, netCDF-4 uses HDF5 as its storage layer. However, a project to convert any HDF5 data to netCDF seems ambitious anf difficult, because HDF5 has a different, more complex data model than the netCDF enhanced data model of netCDF-4. For example, it would be difficult for netCDF to represent these HDF5 features: - non-hierarchical Groups, for example A a parent of B and B a parent of A - user-defined primitive types, for example floating point values with 5 bits of exponent and 13 bits of mantissa - Reference data types, which store pointers to other data objects within a dataset NetCDF supports most of the features of HDF5, but it is intended to be simpler to use and understand, at the cost of not supporting some of the most complex (and powerful) features of HDF5. --Russ ambitious Russ Rew UCAR Unidata Program address@hidden http://www.unidata.ucar.edu Ticket Details =================== Ticket ID: BBA-614330 Department: Support netCDF Priority: Normal Status: Closed